In supra condylar fracture of humerus, the nerve most commonly injured is
**Core Concept**
A supracondylar fracture of the humerus is a common elbow injury in children, typically resulting from a fall onto an outstretched hand. The fracture involves the distal humerus, just above the condyles. Neurological injury is a significant concern due to the proximity of nerves to the fracture site.
**Why the Correct Answer is Right**
The median nerve is the most commonly injured nerve in supracondylar fractures of the humerus. This is because the median nerve is closely related to the medial epicondyle and the humeral condyles, making it susceptible to injury during the fracture. The nerve can be stretched or compressed by the fracture fragments, leading to neurological deficits such as weakness, numbness, or paralysis of the forearm and hand muscles.
**Why Each Wrong Option is Incorrect**
**Option A:** The radial nerve is not as commonly injured in supracondylar fractures, as it is located more laterally and is less likely to be compromised by the fracture fragments.
**Option B:** The ulnar nerve is also not typically injured in supracondylar fractures, as it is more proximal and not as closely related to the fracture site.
**Option C:** The axillary nerve is not relevant in this context, as it is primarily associated with shoulder injuries and is not typically affected by supracondylar fractures of the humerus.
**Clinical Pearl / High-Yield Fact**
In any elbow injury, it is essential to carefully assess the neurological status of the patient, including the median, radial, and ulnar nerves, to identify potential nerve injuries early and initiate appropriate treatment.
**Correct Answer:** A. Median nerve.